surrounding the talks, treasury secretary timothy geithner warned this week the u.s. will not be able to pay its creditors after monday unless the debt ceiling is raised. we will have more on the fiscal cliff talks, speaking with congressmember dennis kucinich after the headlines. environmental protection agency head lisa jackson has announced a resignation ahead of president obama's second term. jackson departs after a four- year tenure that saw advances in the regulation of environmentally harpo practices such as mountaintop removal and the emissions of harmful chemicals from industrial plants. it was marred by a number of key disappointments on environmental issues. president obama rejected jackson's proposal for tougher regulations on smog pollution last year, even though jackson submitted a proposal she viewed as a major compromise. she has recently tried to impose restrictions on carbon emissions from new power plants, drawing a concerted republican and corporate pushback. after ignoring global warming in the 2012 campaign, obama has recently vowed to address it during his second term.